An OFDMA-Based Subcarrier and Power Allocation Scheme in Wireless Cooperative Cellular Systems

An OFDMA-based subcarrier and power allocation scheme is proposed in this paper in the wireless cooperative cellular system. It is assumed that users in this system have the ability to relay information to each other to improve the overall system performance. The formulation of this scheme is to max...

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Veröffentlicht in:Wireless personal communications Jg. 48; H. 2; S. 277 - 289
Hauptverfasser: Tang, Zhihua, Zhu, Youtuan, Wei, Guo, Zhu, Jinkang
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Boston Springer US 01.01.2009
Springer
Schlagworte:
Applied sciences
Communications Engineering
Computer Communication Networks
Engineering
Equipments and installations
Exact sciences and technology
Mobile radiocommunication systems
Networks
Organization, operation and development plans
Radiocommunications
Signal,Image and Speech Processing
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Teletraffic
Transmission and modulation (techniques and equipments)
Frequency diversity
Cooperative diversity
Orthogonal frequency-division multiplex access (OFDMA)
Half-duplex
Subcarrier and power allocation
Performance evaluation
Relay
Wireless telecommunication
Resource allocation
Frequency division multiple access
Information rate
Cell network
Subcarrier
Power allocation
Traffic control
Uplink
Mobile radiocommunication
Orthogonal frequency-division multiplex access (OFDMA); Subcarrier and power allocation
Cooperative systems
Frequency allocation
Teletraffic
Algorithm
Information transmission
Queueing system
Traffic management
Orthogonal frequency division multiplexing
Numerical simulation
Resource management
ISSN:0929-6212, 1572-834X
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Zusammenfassung:An OFDMA-based subcarrier and power allocation scheme is proposed in this paper in the wireless cooperative cellular system. It is assumed that users in this system have the ability to relay information to each other to improve the overall system performance. The formulation of this scheme is to maximize the uplink system throughput subject to the half-duplex, distributed power and queue state constraints of each user. A two-slot resource allocation structure is constructed to deal with the half-duplex constraint. A low-complexity suboptimal algorithm is developed to solve the problem efficiently. This algorithm first greedily allocates subcarriers and power to users and then decides the relay selection. Numerical examples demonstrate the good throughput performance of our propose scheme and the effectiveness of the low-complexity algorithm.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-008-9522-1